com.ibm.tivoli.maximo.report.expr

Class ColumnNameTransformer

java.lang.Object

com.ibm.tivoli.maximo.report.expr.ColumnNameTransformer

All Implemented Interfaces:

ToStringVisitor.Transformer

public class ColumnNameTransformer
extends java.lang.Object
implements ToStringVisitor.Transformer

A Column Name transformer transforms a MBO Field Name into a Database Table Column, adding an optional Qualifier in the process, for Nodes that are Literal Nodes and if the Node's value is a field in the given ObjectName (MBO). Transformers are using the process of converting a Parsed Node tree back into a String representation.

Author:

sls

Constructor Summary

Constructors

Constructor and Description
ColumnNameTransformer(java.lang.String objectName, java.util.Set<java.lang.String> validAttributes, java.lang.String qualifier)

Method Summary

Modifier and Type	Method and Description
java.lang.String	transform(Node n) If this returns a NON NULL value, then this value will replace the Node's .value value, when writing it into the String.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ColumnNameTransformer

public ColumnNameTransformer(java.lang.String objectName,
                             java.util.Set<java.lang.String> validAttributes,
                             java.lang.String qualifier)

Parameters:

objectName - MBO Object name

validAttributes - Valid attributes for the given Object name

qualifier - optional qualifier to use as a prefix when converting the fieldname into a table column name

Method Detail

transform

public java.lang.String transform(Node n)

Description copied from interface: ToStringVisitor.Transformer

If this returns a NON NULL value, then this value will replace the Node's .value value, when writing it into the String. This MUST return null, if you want to use node's value.

Specified by:

transform in interface ToStringVisitor.Transformer

Parameters:

n - Node being transformed

Returns:

new value or NULL if you want to use the node default value